Call transmitter



Sept. 14, 1943. H. w. GOFF 2,329,466

CALL TRANSMITTER Filed Dec. 17, 1940 6 Sheets-Sheet l FIG. 2

/Nl ENTOR H. W GOFF 4ZZI Y CALL TRANSMITTER Filed Dec. 17, 1940 FIG} 6Sheets-Sheet 2 Sept. 14, 1943. H. w. GOFF CALL TRANSMITTER Filed Dec.17, 1940 6 Sheets-Sheet 5 lNl/E/V TOR FIG. 6

h! w GOFF 31% 3 mm? ATTORNEY Sept. 14, 1943. H. w. GOFF 2,329,46

CALL TRANSMITTER FIG.

FIG. /3 I o 5/, a 5 2 9 5 2 L 0 000000 I 000 DOOOQ 0Q A 000000000 0000000 x W N N L N /v 52 x /Nl EN7'OR I y h. w GOFF A T TORNE K Sept. 14,1943. H. w. GOFF 2,329,466

CAL-L TRANSMITTER Filed Dec. 1'7, 1940 6 Sheets-Sheet 6 F/G. /5A FIG.I58

FIG. /7

INVENTOR H W GOF F A T TORNE Y M sat. 1 2,329,466

I STATES- :PATENT OFFICE CALL TRANSMITTER Harold W. Golf; Manhasset, N.Y., assignor to Bell Telephone Laboratories, Incorporated, New York, N.Y., a corporation of New York Application: December 17, 1940, Serial No.310,452 8' Claims; (01.179 90) This invention relates to'tel ephone calltransmitter devices.

The'object of the invention is to combine a call transmitter of the;repertory: dial type with acall Fig. 14 is a detail view showing thedigit defining elements resetting mechanism in position for resettingsuch elements followingvthe transmission of the call;

Fig. 15A is a side view thereof showing a numtransmitter of thekey-controlled type in a single 5 her of digit defining elements in theoperated unit usinga common pulsing mechanism. position and the resettinmechanism positioned In the drawings: v for the repeating of a call;

Fig. 1'. is a planv view-showing the pointer in Fig. 158 is a viewshowing the digit defining position for the transmitting of a call setbythe elements in reset position as efl'ected by themanoperation-otthekeys; 'ual operation of a handle placed at the front.of

Flg.2is'a'1ront view; the casing housing the transmitter operating Fig-L3 is atop assembly view of the call transs' mechanism; mitter operatingmechanism shown with the cas- Fig. 16 is a modification of the pulsingmechingv in section; anism; and

Fig; ii'sa partial front view showing-the'cards Fig. 17 is a view of oneOf the code elements on which the namestotthesubscribersare printed usedin connection with the repertory mechanism for indicating, incooperation with the pointer, shown in adjusted position on itssupporting the operation of one 01. the code elements comshaft. 7 prisedin the repertory mechanism, the pointer. In the call transmitter of theinvention, a plubeing. shown in position associating the pulsing 20 ityo key members K1, K2, K3, K4,.K5, K6, K1. mechanism with thekey-controllodidlgit setting Ks, K9 and K10 are pivoted on a commonshaft i l mechanism; r shown in Figs. 3, 5, 6 and 7 Journaled in theup-Fig.5 is'ai right si'dervi'ewgshownwith portions right extending arms aand d1 of a U-shaped of the casing cut away on line 5-5iofFig. 3;support l2 secured to a base I3 by a plurality of Fi.6"isa-verti'ca1cross-sectibnai view takenon screws II. The keys etc.,are provided line 66 of Fig. 5; with downwardly extending arms I6, bestseen in Fig. 7 is aright'side view showing a number of Figs. 5, 7 and10, engaging a comb element l5 operating parts in section taken on line7-1 of serving for holding the keys K1, K2, etc., in spaced Fig. 3;relation to each other and at predetermined en- Fig. 8 is a partial viewof the key-controlled gaging points along a bar I9 provided for apurcall setting mechanism v shown in: normalv nonpose which will behereinafter described in detail,

' operated position, a number of operating parts retractile springs I!being provided for normally being shownipartly -in.sectiom, holding thekeys K1, K2, etc., in normal non- Fig. 9 is a partial view of thkey-controlled operated position as defined by stops afforded by call.setting mechanism shown with, atnumber of lug members I8 formed with thearms 16 of the parts in their operated positions; keys abutting againstthe comb element l5.

' Fig..10;-is, a: partial: left" side. view: showing the The keys K-l,K2, etc., areprovided with arms Y, pulsing mechanisminthe-operat'edposition with Y2, Y3, Y4, Y5, Y6, Y1, Ya, Y9 and YlO Ofdifferent the baseLand the;v casing shown! in section; lengths disposedin engageable relation with the Fig; 11 is. apartial view; showing; thepulsing 49 bar 19 having arms such as bi and 019 secured to and shuntingsprings, inoperative relation with a shaft 20, the bar I!) beingdisposed at an angle the cams actuated by the test pawl operatingrelative to the length of shaft 20 to form in c0- mechanism, a member ofoperating parts. being operation with the arms Y, Y2 and Ya, etc., ofthe shown insectionzt'alenon line il -H ofFig. 1Q; key members Kl, K Ks,etc., a difierential mech- Fig. 12 isapartial view showing thestar-wheel anism for imparting angular movements to shaft and themechanism operati g the: test pole, a 20' which ar proportional to thenumerical values num o perating parts e g S wn in section of the keys toperform a function which will be takenon 1ih 0f is= hereinafterdescribed in detail.

Fi 1 s a developed v of the wheel The shaft 20 is journaled on the armsa and a1 porting die t definins'elementi n m r of 50 of U-shapedsupport. l2 and on the upright eX- roups of dig de n elements beingShown tending support 2| secured to the base l3 by a operated so asto-form the'int'erdigitsspacesbenumber of screws 22 and to one end ofshaft 20 tween the digit defining elements forming the is securelymounted a lever member 23 best seen telephone call designation to betransmitted; in Figs. 3, 5, 6, 8 and 9 to the free end of which ispivoted one end of a connecting rod 24, while the ment of connecting rodother end of this rod connects with the arm portion of a yoke-likeshaped member 26 pivotally mounted at the free end of laterallyextending arms b and bi formed with a lever 28, best seen in Figs. 3, 5,7, 8 and 9, in turn mounted for pivotal reciprocating movement on abearing or hub 29 laterally extending from an upright supporting memberor flange 30 secured to the base |3, while the yoke member 26 serves forpivotally mounting a spring pressed pawl 21 in engageable relation witha plunger 35 mounted in the hub 29. The pivotal movement of the yoke 26,and thereby the movement of pawl 21 as for actuating the lunger 35, islimited upon the downward move- 24 as effected by the operation of thekey members K1, K2, K3, etc., by an arm 31 formed with the yoke 26,abutting against the arm b of lever 28 and upon the upward movement ofconnecting rod 24 as effected by the tension of a retractile spring 33by an extension ea: of pawl 21 abutting against a projection 36 of armb1 best seen in Figs.- 7, 8 and 9 on which the yoke 26 is pivoted, thespring 33 having one of its ends hooked to the arm 23 and its other endto a stud st laterally extending from supporting flange 30.

Lever 28 is held in normal position against the tension of retractilespring 33 by a lug 32, best seen in Figs. 3, 5, 6 and 7, while aspringpressed pawl 3| mounted at the free end of lever 28 is normallyheld disengaged from the teeth of ratchet wheel 38 due to theengagementof a lug Li carried by this pawl with the stop lug 32 and the tension ofspring 33 holding this lever against the stop 32.

According to the mechanism abovedescribed, the operation of any one ofthe key members, as K for example, from its normal position shown inFig. 5 to its operated position shown in Fig. '7 is effective to impartan angular movement to the shaft and lever 23 carried thereby throughthe engagement of its arm YlO with the bar l9, while the movement oflever 23 is in turn effective to impart a pivotal movement to the yoke26, the extent of which is determined as above described by the arm 31of this yoke engaging the arm of lever 28 on which this yoke ispivotally mounted.

The pivotal movement of yoke 28 from the position shown in Fig. 8 to theposition shown in Fig. 9 is effective to move the pawl 21 for impartinga longitudinal movement to the plunger 35 to a point wherein the pawl 21is caused to slip over this plunger for releasing it and thereby"permitting its return movement in a manner and for a purpose which willbe hereinafter described in detail, while the continued movement oflever 23 following the operation of plunger 35 is effective to impart apivotal movement to lever 28, on hub 29, which movement causes the pawl3| carried thereby to fall on the ratchet wheel 38 and inefiectivelymove over a number of teeth thereof corresponding to the numericalvalues of the-operated keys, 1. ten teeth plus a nume her of teethcorresponding to an interdigit space as INT in the code disc CD shown inFig. 17 or the interdigit spaces N between groups of digitdcfiningelements as indicated diagrammatically in Fig. 13,, thusrotating this ratchet wheel in a direction indicated by the arrow shownin Figs. 5 and 7 upon the return movement of lever 28 to normal underthe tension of retractile spring 33 when the pawl 3| is againdisengagedfrom the ratchet wheel 38 and the lever 28 arrested by its engagementwith the stop lug 32 while the pawl 21 is caused to reengage the plunger35 as shown in Fig. 8 by thetension of its own retractile spring.

A shaft 39 is supported by upright supports 40 and Al and bya supportingflange 4|c best seen in Figs. 3 and '1 and on the right disposed end ofthis shaft in position concentric to plunger 35 is mounted forfree'rctation thereon a plate PL having an arcuated lug portion'OPnormally engaging" the free end of a lever LX securely mounted on ashaft 92 to perform a'function which will be hereinafter described indetail and on shaft 39 adjacent the plate PL are mounted the ratchetwheels 38 and 38 secured to 'each other for rotation as a unit, thewheel 38 being as above described engaged by the pawl 3| carried by thelever 28.

The plate PL is formed with two laterally extending lug portions 43 and44 for pivotally mounting an arm 45 in operative relation with theplunger 35 while an arm 46, best seenin Figs. 5, '1, 8 and 9 formed withthis plate, is provided for pivotally mounting the spring-pressed pawls48 and 49, the pawl 48 engaging-the ratchet wheel 38a while pawl 49engages a ratchet wheel 50, the latter being secured to a wheel 5| keyedto the shaft 39 to which a plurality of code discs as CD shown in Fig.13 are mounted there being one hundred and twenty teeth formed with eachratchet wheel 38, 38a and 50, respectively,

On wheel 5|, at the periphery thereof, is mounted a plurality oflongitudinally movable digit defining elcments'in the form of pins 52which may be moved from normal position shown in-Fig. 8 to operatedposition shown at A in Figs. 9 and 15a for controlling the operation ofthe pulsing mechanism which is of the type described in Patent2,036,037, issued to H. W. Goff, March 31, 1936. The longitudinalmovement of the pins 52 as for setting a call by the operation of keymember K1, K2, K1, etc., is effected by a plunger member 53 ofrectangular cross-section slidably mounted in a guide formed at.

the free end of plate'PL and shown in Figs. 3, 5, 6, 7, 8,and 9; while aretractilespring 54 is provided for returning this plunger to normalposition following each operation of arm 45 as effected by plunger 35,the width of plunger 53 being equal to the width of the interdigitportion INT of code disc CD in turn equal to live pins 52 in wheel 5|for moving such groups of pins collectively in response to each keydepressed in the setting of a call designation to form the so-calledinterdigit spaces between each of the groups of pins 52 whichiremainunoperated and which like the notches N in the code disc CD Iorm'thedigits of thetelephone call. designation to be transmitted.

The plate PL is held in normal position against the stop lug 32 by aretractile spring 42 and is moved step by step for positioning theplunger 53 in operative relation with the pins 52 depending upon theoperation of the key members K1, K2, K3, etc., through the rotation ofratchet wheel 38 by pawl 3| and the consequent rotation of ratchet wheel38a .engaging'the pawl 48 carried by the arm 46 of plate PL while a pawl49, also pivotedon arm 46 of plate PL, engages the ratchet wheel 5|lsecured to the wheel 5| for holding the plate PL in its advancedposition against the tension of its retractile spring 42.

The upright member 40 is provided'with a plurality of laterallyextending studs 56, best seen in Figs. 8, 9; 14, 15A and 15B, on whichis slidably mounted a disc 51, having a hub portion CP which will behereinafter described in detail, coil,

springs 62 on stud 56 being provided for normally holding the disc 51 inspaced relation with thepin 52 and thereby the forked lever 60 inposition wherein the roller 63 carried thereby rests against a disc 64keyed to the shaft 39 and having a cam portion 65 provided for normallyengaging the roller 63 for imparting the pivotal movement to forkedlever 60 and thereby a sliding movement to the disc 51 on stud 56 forreturning the operated pins 52 in normal position shown in Fig. 8,following each turn of the shaft 39 and wheel I, that is, following eachcall transmitting operation.

The turning of handle YX from the position shown in Fig, 2 to theposition marked REPEAT, V

the movement of shaft ST and the crank pin 6| is effective to impartadownward movement to the forked lever 69 for moving it from theposition shown in Fig. 14 to the position shown in Fig. 15A forpositioning the roller 63 out of the path of cam 65 so that the disc 51is not operated and the pins 52 are not returned to normal following thecomplete turn of 'shaft,,39 and that of wheel 5I, thus permittingrepeating a call set by the operation of the key members by the simpleoperation of a handle 66 as for tensioning a motor spring ina mannerwhich will be hereinafter described in detail, while the movement ofshaft ST by the operation of handle YX from the position marked REPEATto the position marked RESET is efiective to move a lever SL secured tothe shaft ST from the position shown in Fig. A to the position shown inFig. 15B for imparting a pivotal movement to the forked lever 60 whichin turn imparts a sliding movement to the disc 51 on stud 56 and againstthe tension of retractile springs 62 for returning the operated pins 52to normal position.

A cross-bar CA shown in Figs. 3, 8, 9, 15A and 15B is formed integrallywith the discs 64 both secured to the shaft 39 and serve for keying thecode discs CD to this shaft while affording means for readily aligningthese code discs in a common starting position relative to a test pawl98, best seen in Figs. 3, 7 and 10, the function of which will behereinafter described in detail.

The shaft 39, the code discs CDand the wheel 5| keyed on this shaft arerotated by a motor spring mechanism comprising the handle lever 66 shownin Figs. 1, 2, 3, 5 and 6 having a clutch element 61, best seen in Fig.3, engaged with its complement clutch element 68 formed with a gearsector 69. The movement. of handle 66 and that of gear sector 69 fromits normal position against the stop S1 to its operated position againstthe stop S2, best seen in Figs. 3 and 5', is effective to tension themotor spring 10, the latter having one of its ends hooked on. the gearsector 69 and its other end secured to tne gear sector supportingspindle 1I, the latter extending laterally from.

the supporting flange The gear sector/69 meshes with a pinion 12, shownin Figs. 3 and 5, mounted for free rotary movement with a ratchet wheel12a as a unit on a shaft14 journaled in flange 39 and on an uprightsupport 15 secured to the base I3 by a number of screws SC. A gear 15also mounted for free rotation on shaft 14 is provided with twospring-pressed pawls 11 and 18 shown in Figs. 3 and 5 engaging theratchet wheel 12a so that the returnmovement of handle 66 and that ofgear sector 69 under the tension 5 of motor spring-10 is effective torotate the gear 15 through the engagement of pawls 11 and 18 with theratchet wheel 12a. The rotary movement of gear 15 is transmitted to theshaft 14 through a pinion 19 mounted for rotation with a gear 80 as aunit on a spindle 8I laterally extending from the supporting flange 30while the gear I8 meshes with a pinion 82 keyed on the shaft 14. Theangular movement of gear sector 69 as defined by stops S1 and S2 beingsuch, relative to the speed ratio of pinion 12, gears 15 and 80, andpinions 19 and 82, as to impart to shaft 14 under the tension of motorspring 19 thirty turns for each operation of the handle 66.

On shaft 14 is securely mounted a gear I60 engaging a pinion I6I carriedby the spindle I62 of a centrifugal speed governor I63 shown in Fig. 3provided for controlling the operation of the pulsing mechanism whenoperating under the tension of motor spring 10. Shaft 14 is operativelyconnected to a second shaft 84 as'shown in Figs. 3, 6, '7 and 10 by themeter gears 85 and 86 and on shaft 84 is keyed a worm 81 disposed inengagement with a worm wheel 88 keyed to the shaft 39 on which the codediscs CD are mounted. The speed ratio between the worm 81 and worm wheel88 being of the order of 30 to 1 so chosen for a purpose which will behereinafter described in detail.

On shaft 84 is mounted a wheel 89, best seen in Fig. 12, of the typedisclosed in Patent 2,036,031 above mentioned having four cam portionsP1, P2, P3, P4 engaged by a spring-pressed lever member 90, seen inFigs. 3, 6, 'Zand 10, and on this lever rests one arm m of anangular-shaped lever 9IA, the other arm of which serves in cooperationwith a similar arm 9Ia shown in Figs. 3, 6, 7

' and 10 for mounting'a bar 93 of inverted U- shaped cross-section inparallel relation to shaft 39. Levers 9| and 9Ia are keyed to a shaft 92journaled in upright supporting-flanges 30 and M0, while a retractilespring G, coiled around shaft 92, holds the arm m of angular lever 9I inoperative relation with the arm I9 resting on the cam wheel 89.

reciprocated once for each cam P1, P2, P3 and P4, of wheel 89 or 4 30120 reciprocating movements for each turn of code disc CD and once foreach pin 52 mounted on wheel 5I keyed on on shaft 39. The reciprocatingmovement of bar 93 is imparted to a downwardly extending lever member94, best seen in Fig. 10, held in, operative relation with the bar 93 bya spring 95 and to the free end of lever 94 is mounted the test g pawl96. On a spindle 91 is pivotally mounted another downwardly extendingarm 98 shown in Figs. 6, '1, f0, 11 and 12, having a projection 99'formed therewith abutting against the upward extending arm of angularlever 9| under the tension of a spring I00, best seen inFig. 10, forimparting reciprocating movement to an arm 98 in phase with theoperation of test pawl 96 as effected by the rotation of cam wheel 89for moving combined segmental members IOI, I02, I03 and I04 ofinsulating material in position for actuating pulsing and shuntingcontacts P and S, respectively, under control of the pins 52, which maybe set by the operation of the .key members K1,v K2, K3, etc., or'thatof code disc CD in the manner described in the above-mentioned Accordingto this mechanism the bar 93 is 4- asaaeee patent; a stationary cam cm,best seen in Figs. 7, 10 and 11, being provided for returning eachsegment IOI, I02, I03 and I04 to normal position following the operationof spring P and S.

The arm 94 carrying the test pawl 96 is mounted for free pivotalreciprocating movement on a nut I06, Figs. 3, 5, 6 and 10, engaging a.lead screw I01. This lead screw is journaled on the top portion ofupright members 30 and 4 lo while the nut I is formed with two lugportions I08 straddling a bar I08 securely mounted on the uprightsupporting members 30 and Me so as to prevent the rotation of the nut Iduring the rotation of lead screws I01 and thereby causing the movementof arm 94 and the test pawl 35 carried thereby in selective operativerelation with the code discs CD on shaft 38 or the digit definingelements 52 on wheel 5|.

A second lead screw III shown in Figs. 3, 5, 6, 7 and i0 journaled insupporting flanges 30 and He is operatively connected to lead screw INby gears H2, H3, respectively, and on lead screw III is mounted a nut H4having a yoke shaped member H5 secured thereto and extending betweenrails H6, best seen in Figs. 4, 5 and 7, forming receptacles forcardsI20 and I2l on which subscribers names having the telephone designationsrepresented by the code discs CD are inserted and on the card I20 inaddition to subscribers names are printed, as shown in Figs. 1 and 2,the words Key operated in registry with which the pointer or index I I1carried by the yoke H5 is moved for associating the test pawl 96 withthe digit defining elements 52 on wheel 5|, the rotation of lead screwsI01 and I II being effected by a manually operable knob I I0 secured .toone end of lead screw I01.

A glass window I22 is clamped to the underside of the front end ofcasing I23, as shown by clips CLl shown in Figs. 5, '7 and in superposedrelation to the cards I20 and I2I which are removable from theirreceptacles I through openings I30 and I3I, shown in Fig. 4, while thecasing I23 is secured to the base I3 by a plurality of screws SCS, shownin Figs. 3, 5, 6 and '7, such casing having projections I30 forming acradle serving for receiving the telephone handset HS, shown in Figs. 1and 2.

In the modification of the pulsing mechanism, as shown in Fig. 16, theshaft 84 carries two quadruple cams 88 and 80b disposed angularly fromeach other on this shaft an angular distance of 45 degrees, while alever I5I hich is pivoted on lugs extending from the base I3 is disposedfor operation by the rotation of cam 83b and another lever I50 securedto a shaft 52 is disposed for operation by the rotation of cam 89. Onshaft 82, which is journaled on lugs extending from the base I3, issecured a lever 94 to which the test pawl 96 is mounted for cooperationwith any one of the code discs CD or with the digit defining elements 52as the case may be. A spring I52 normally holds the lever I50 inoperating relation with the cam wheel 89 and thereby the test pawl 98 incoacting relation with the code disc CD, which may be selected whilelever 94 is provided at its free end with a stud I53 of insulatingmaterial disposed in engageable relation with a contact spring I54.Similarly, the lever I5l is provided at its free end with a stud I55 ofinsulating material disposed in engageable relation with a contactspring I56, theinsulating studs I53 and I55 being such as to permit theclosure of the contact springs I54 and I58 when the lever I50 rides overone of the points of cam 80 while the lever IN is engaged between two oithe cam points or cam 08b.

According to the pulsing mechanism of the invention due to the contactsprings 04 and I55 5 being caused to alternately move away and towardeach other simultaneously with the consequent quick closure and openingof the springs, as effected by the operation of cam 85 and 891) undercontrol of the test pawl 96 and code discs 10 CD, or under control ofthis test pawl and the digit defining elements 52 on wheel H, a highdegree of accuracy in the transmitting of pulses is obtained.

In a typical call, setting and transmitting operation of a telephonecall designation by the operatlon of the key members K1, K2, K1, etc.,sup posing that it is desired to establish a talking connection with thesubscriber having the call designation 0352952 for example, the manualoperation of knob H0 is effective to move the index H1 in registry withthe mark Key operated printed on the card I20 while positioning the testpawl 86 in cooperating relation with the digit elements 52 which may bemoved from normal position, shown: in Fig. 0, to the'position shown at Ain Figs. 3 and 9, by the operation of the keymembers K1,K2, Ks, etc;I'he operation or key K10, the first digit oi the telephone calldesignation 0352952 above mentioned, is eflective to impart a rockingmovement to the bar I3 for pivoting the shaft 20 and thereby imparting amovement to the arm 23 against the resistance of retractiie spring 33.The downward movement or arm 23 and that or connecting rod 24 iseflectlve to impart a pivotal movement to yoke 26 for moving the plunger35 through its engagement with the pawl 21 from the position shown inFig. 8 to the position shown in Fig. 9 wherein the pawl 21 is caused toslip over this plunger for permitting its return movement to normalduring the continued operation of the key and that of lever 28 which isoperated upon the engagement of arm 31 of the yoke with the arm I) oflever 28, the angular movement of this lever from its normal positionagainst the stop lug 22-,

Fig. 7, being equalto fifteen teeth of ratchet wheel 38 with which thepawl 3| carried by this lever engages.

The pivotal movement of the yoke 28 and the consequent longitudinalmovement of plunger 35 is efiective to impart a pivotal movement to arm45 for moving the plunger 53 mounted at the free end or plate PL formoving a group at pins 52 from the position shown in Fig. 8 to the posi-5 tion shown in Fig. 9, that is, in engageable relation with the testpawl 55, the width of plunger 53 being as above described equal to fivepins 52 on wheel 5I.

The return movement of key Km as effected by the tension of retractiiespring 33 acting on lever 23 is effective to return the yoke 26 from theposition shown in Fig. 9 to the position shown in Fig. 8 and returns thelever 28 to normal upon the engagement of arm ea: of pawl 21 with thelug 36 extending from the arm bl or lever 28,

to the plate PL through the engagement of pawl 48 with the ratchet wheel38a.

The plate PL and the arm 45 pivoted thereon are now in the positionshown in Fig. 5 and the lever 28 in normal position against the stop lug32 with the pawl 3| disengaged from ratchet -each operation of thehandle 66.

now in normal position. The operation of key K3, the second digit of thetelephone call designation above mentioned is eifective to operate theyoke 26 for imparting a pivotal movement to arm 45 for actuating theplunger and thereby moving a second group of pins 52 in engageablerelation with the test pawl 96 and imparts an angular movement to lever28 which is proportional to the numerical value of the key, 1. e., equalto eight teeth of ratchet wheel 38, five of which are moved by theplunger 53 to form the interdigit space between the digits and 3 orbetween any other train ,of pulses comprised in a given calldesignation, the pawl 49 in cooperation with ratchet wheel 50 holdingthe plate PL in each advanced position against the tension oi itsretractile spring 42 above mentionedl Upon the complete setting of thecall designation 0352952, as shown diagrammatically in Fig. 13, which iseffected in the manner described in connection with the operation of keymembers K10 and K3, the operation of handle 66 and that of the gearsector 69 from the position against the stop S1 to abutting relationagainstthe stop S2, best seen in Fig. 5, is effective to rotate pinionI2 and the ratchet wheel 12a one turn while tensioning the motor spring10 which upon the release of handle 66 by the operator is effective torotate the shaft I4 through the engagement of pawls I7 and I6 carried bygear with the ratchet wheel La. The rotation of shaft I4 as eifected bythe gear train which comprises the gear 15 in engagement with pinion I9which is mounted for rotation with the gear 80 and the engagement ofthis gear with pinion 82, keyed to the shaft 84, the speed ratio beingas above described thirty turns of shaft I4 for each turn of pinion 12as imparted by the gear sector 69 in its movement from stops S1 to S2.

The rotation of shaft 14 is imparted to shaft 84 by the meter gears 85and 86 and to shaft 39 in the direction indicated by the arrow in Fig.10

by the worm 81 and the worm gear 88 having thirty teeth so as to make acomplete turn for The rotation of shaft 64 and the four-point cam wheel89 keyed thereon is effective to impart pivotal reciprocating movementto the bar 93 and thereby to the lever 94 and test pawl 96 at a rate ofone reciprocating movement for each and in phase with the pins 52 in thewheel 5|, that is, 120. Upon the rotation of shaft 39 and the passing ofthe five pins which have been set by the operation of key Km in the pathof test pawl 96, the reciprocating movement of this pawl and, therefore,that of 1ever 98 connected thereto is prevented and the insulatingsegments l0I, I02, I03 and I04 are rotated in a path ineffectiverelative to'pulsing and shunting contacts P and S, re-

spectively However, upon the passing of the first pin of the ten pingroup representing the digit 10 in registry with the test pawl 96, thispawl is permitted to move according to the movement of the cam wheel 89to cause the pivotal movement of lever 98 for moving one of theinsulating cam segments IUI, I02, I03 and I04 as the case may be in thepath of the pulsing contact P and shunting contact S for operating them,and the operation of the test pawl 96 is repeated foreach pin in thedigit 10 until the first and the succeeding pins of the interdigit groupwhich have been set by the operation of key IQ pass in registry with thetest pawl 96 for preventing its operation and this operation is repeatedfor each succeeding digit and interdigit period in the transmitting ofthe call as in this example 0352952, by the operation of pulsing andshunting springs P and S as above mentioned.

In the transmitting of a telephone call designation having seven digitsas for example 0352952, it is to be noted that the number of pins usedfor setting such a call designation is thirty-six pins for the digits ofthe call designation plus thirtyfive for the interdigit pins making atotal of seventy-one pins out of a total of one hundred and twenty pinsin the wheel 5I so that the movement of the test pawl 96 must beprevented immediately following the transmitting of the last i digit, i.e., 2 as in the call designation 0352952. According to the presentinvention, the plate PL which, as above described, is held in eachadvariced position during the setting of the call against the tension ofits retractile spring 42 when the wheel 5I is in normal position, therotation of this wheel as effected by the tension of spring I0 causesthe return movement of plate PL to a point wherein the projection OP'engages with the end of lever LX secured to shaft 92 for holding thetest pawl '96 from operation by the cam wheel 89, the engagement ofprojection OP with lever LX being timed to occur immediately followingthe last pulse of the digit transmitted have been formed as shown inFig. 17, for example, the knob III) is rotated for moving the pointerII! in registry with the name of the called subscriber, the movement ofknob H0 and pointer Ill actuated thereby being effective to position thetest pawl 96 in operative relation with the code discs CD formed torepresent the call designation corresponding to the name indicated bypointer I I1. Under this condition the operation of handle 66 iseffective to tension the motor spring 66 for actuating the pulsingspring P and the shunting spring S under control of the code discsselected in a manner similar to that described in the patent abovementioned.

I is understood that minor changes may be made in the combined repertoryand key-controlled call. transmitter mechanism of the invention withoutdeparting from the scope of the invention. i

What i claimed is: if

1. A call transmitter comprising a plurality of code discs, a set of keymembers, digit defining elements set by the operation of said keymembers, a pulsing mechanism, and manually operable means foroperatively associating said pulsing mechanism with said discsselectively and said digit defining elements for transmitting callseither according to the operation of the selected code discs oraccording to the digit elements set by the operation of said keymembers.

2. A call transmitter comprising a plurality of code discs, a wheelhaving longitudinally movable digit defining elements, a common pulsingmechmember. I

3. In a call transmitter, a shaft, a plurality of code'discs and a wheelkeyed to said shaft, 9.

plurality of digit defining elements disposed in a row on said wheel, apulsing mechanism geared to said shaft, said mechanism having a testpawl, a manually operable knob for moving said test pawl in operativerelation with said digit defining elements in said row and said codediscs selectively, a set of key members for moving groups of said digitdefining elements in operative relation with said test pawl fornegativing predetermined operation thereof, and motor means foractuating said shaft for sending a call according to the selectedposition of said test pawl relative to said code discs and saidelements.

4. In a calltransmitter, a rotatable shaft, a plurality of code discs,and a wheel keyed to said shaft, said wheel having a plurality ofmovable digit defining elements mounted thereon, a contact, an actuatingmechanism for said contact having a test pawl, a set of key members formoving said elements in position for setting a call, and manuallyoperable means for operatively associating said test pawl with said codediscs and the elements set by the operation of said key on membersselectively for transmitting series of pulses according to the call setby the operation of said key members and the selective operation of saidmanually operable means upon the rotation of said shaft.

:"i. In a call -i;ransmltter, a base, a set of key members, a shaftmounted for rotary reciprocat i'ng movement dn said base, a bar securedto said shaft at an angle relative to the length thereof, said keymembers having arm portions of dif= ferent lengths operatively engagingsaid bar for imparting angular movements to said shaft cor responding tothe numerical value of said key members, a lever carried by said shaft,a pair of supports secured to said base, another shaft mounted forunidirectional movement on said supports, a wheel secured to said shaftat one end thereof, a plurality of longitudinally movable pins disposedin a circular row on said wheel, an upright support having a bearingportion, a plate pivoted on said shaft movable in a plane parallel tosaid wheel and having a plunger disposed in engageable relation withsaid pins, another plunger mounted in said bearing portion, an armpivoted at one end of said plate and having its other end disposed inengageable re lation with the plunger carried by said plate, said armbeing disposed for operations by the movement of the plunger in saidbearing portion, another arm mounted for pivotal movement on saidbearing, a yoke pivotally mounted on the last-mentioned arm, a rodoperatively conmeeting the first=rnentioned arm to said yoke, and a pawlcarried by said yoke for moving the second-mentioned plunger foroperating the secend-mentioned arm for changing the position of a numberof said pins on said wheel group by group for setting a call comprisinga plurality of digits upon the successive operation of said key members.

6. In a call transmitter a pulsing cam, a contact operable by themovement of said cam, a rotatable shaft, a plurality of code discs and awheel supported by said shaft, a plurality of digit defining elementsmounted on said wheel, a test pawl, manually operable means for movingsaid test pawl in coacting relation with said wheel and said code discselectively, a mechanism for imparting a pivotal reciprocating movementto said test pawl in each of said selective coacting relations, onereciprocating movement for each of said pins on said wheel, said digitdefining elements being normally positioned in a path out of coactingrelation from said test pawl, a mechanism actuated by said test pawl tocause the operations of said contact by said cam, a set of key membersoperable for positioning groups of said digit defining elements incoacting relation with said test pawl for setting a call, an indexmember, name cards, a manually operable mechanism for moving said indexon said name cards for indicating the selected position of said testpawl relative to said code discs and said wheel and motor means foractuating said shaft for transmitting such call.

7. In a call transmitter, a pulsing mechanism having a test pawl, ashaft geared to said mechanism, a cam and a wheel keyed on said shaft, aplurality of pins mounted on said wheel and movable longitudinally forassociation with said test pawl, a set of numbered key members operablefor moving groups of said pins in such association for controlling theoperation of said pulsing mechanism upon the rotation of said shaft, apair of supports for said shaft, one of said supports having projectionsextending perpendicularly thereof, a disc mounted for sliding movementon said projections and disposed for engaging said pins, said dischaving a collar portion, a crank shaft, a forked lever having one endpivoted on said crank shaft and engaging the collar portion of saiddisc, a roller mounted at the free end of said forked lever and normallypositioned for engaging said cam upon a move ment of the latter forreturning said pins to nor mal position through the operation of saiddisc, following the transmission of the call set by the operation ofsaid key member, a handle for rotating said crank shaft for moving saidroller out of engagement from said cam to render the movement of thelatter ineffective relative to said disc for permitting repeating saidcall, the movement of said handle in another position resetting saidpins in normal position independently of said cam.

8. In a call transmitter, a pulsing, contact, a test pawl, a rotatableshaft, 9. wheel, actuating means for imparting pivotal reciprocatingmovement to said test pawl, a ratchet wheel keyed on said shaft, aplurality of operable digit defining elements mounted on said wheel, amechanism for moving said elements in coacting position with said testpawl for controlling the operation of said contact, said mechanismcomprising a set of key members, a pivoted shaft, a bar and an armsecured to said shaft, said key members having means cooperating withsaid bar for imparting angular movements to said arm proportional to thenumerical values of said key members, an upright support having abearing, another arm mounted for pivotal movement on said bearing, ayoke pivoted on the secondmentioned arm, a rod operatively connectingthe first-mentioned arm and said yoke for imparting movement to saidyoke and to said secondmentioned arm upon the operation of each of saidkey members, a pair of ratchet wheels mounted for rotation as a unit onsaid rotatable shaft, said second-mentioned arm having a pawl engagingone of said wheels, a plate mounted on said rotatable shaft having apawl engaging the other ratchet, wheel of said unit whereby the movementof said second-mentioned arm is imparted to said plate another pawlcarried by said plate engaging the first-mentioned ratchet for holdingsaid plate in each advanced position relative to said wheel, a plungercarried by said plate positioned relative to a number of said elementsupon each operation of said plate, a mechanism actuated by the pivotalmovement of said yoke for moving said elements in coacting relation withsaid test pawl for setting a call, and

retractile spring for returning said plate to normal position during thetransmitting operation of such call.

HAROLD W. GOFF.

